Comparison of 2-Level and Quasi-2-Level Topologies in a Bidirectional Isolated DC-DC Converter for MVDC Networks
High-power DC-DC converters are essential for efficient power conversion in emerging DC networks. This paper presents a comparative analysis of bridge topologies suitable for medium-voltage (10-40 kV), isolated DC-DC converters, focusing on a 2-Level topology using series-connected SiC MOSFETs, and quasi-2-Level topologies, specifically the Flying Capacitor Converter and the Modular Multilevel Converter. Key performance indicators (KPIs) including semiconductor devices counts, voltage slew-rate during switching (dV/dt), energy stored in passive elements, and efficiency are analyzed. KPIs are evaluated across various voltage levels and two specific case studies. The Modular Multilevel Converter with quasi-2-level operation is demonstrated to be particularly appealing at higher voltage levels due to its modular design.
Authors
- Cyril Buttay (ORCID: https://orcid.org/0000-0001-7140-5804)
- Besar Asllani (ORCID: https://orcid.org/0000-0002-3226-2051)
- Maryam Saeedifard (ORCID: https://orcid.org/0000-0001-8859-7339)
- Piotr Dworakowski (ORCID: https://orcid.org/0000-0002-6893-0103)
- Jean-Yves Gauthier (ORCID: https://orcid.org/0000-0001-6640-142X)
- José Andrés Aguilar Croston
Institutions
- Université Claude Bernard Lyon 1 (FR)
- École Centrale de Lyon (FR)
- Centre National de la Recherche Scientifique (FR)
- Georgia Institute of Technology (US)
- Laboratoire Ampère (FR)
- Supergrid Institute (FR)
- Institut National des Sciences Appliquées de Lyon (FR)
Publication Details
- Published
- 2025-03-16
- DOI
- https://doi.org/10.1109/apec48143.2025.10977191
- Citations
- 1
- Primary Topic
- Advanced DC-DC Converters
- Type
- article
- Field-Weighted Citation Impact
- 0.73